I could blossom you could blossom he could blossom we could blossom you could blossom they could blossom
V-ing form
I could be blossoming you could be blossoming he could be blossoming we could be blossoming you could be blossoming they could be blossoming
Perfect
I could have blossomed you could have blossomed he could have blossomed we could have blossomed you could have blossomed they could have blossomed
V-ing perfect
I could have been blossoming you could have been blossoming he could have been blossoming we could have been blossoming you could have been blossoming they could have been blossoming
Negation
Simple form
I couldn't blossom you couldn't blossom he couldn't blossom we couldn't blossom you couldn't blossom they couldn't blossom
V-ing form
I couldn't be blossoming you couldn't be blossoming he couldn't be blossoming we couldn't be blossoming you couldn't be blossoming they couldn't be blossoming
Perfect
I couldn't have blossomed you couldn't have blossomed he couldn't have blossomed we couldn't have blossomed you couldn't have blossomed they couldn't have blossomed
V-ing perfect
I couldn't have been blossoming you couldn't have been blossoming he couldn't have been blossoming we couldn't have been blossoming you couldn't have been blossoming they couldn't have been blossoming
Interrogative form
Simple form
could I blossom? could you blossom? could he blossom? could we blossom? could you blossom? could they blossom?
V-ing form
could I be blossoming? could you be blossoming? could he be blossoming? could we be blossoming? could you be blossoming? could they be blossoming?
Perfect
could I have blossomed? could you have blossomed? could he have blossomed? could we have blossomed? could you have blossomed? could they have blossomed?
V-ing perfect
could I have been blossoming? could you have been blossoming? could he have been blossoming? could we have been blossoming? could you have been blossoming? could they have been blossoming?
Interro-negative form
Simple form
couldn't I blossom? couldn't you blossom? couldn't he blossom? couldn't we blossom? couldn't you blossom? couldn't they blossom?
V-ing form
couldn't I be blossoming? couldn't you be blossoming? couldn't he be blossoming? couldn't we be blossoming? couldn't you be blossoming? couldn't they be blossoming?
Perfect
couldn't I have blossomed? couldn't you have blossomed? couldn't he have blossomed? couldn't we have blossomed? couldn't you have blossomed? couldn't they have blossomed?
V-ing perfect
couldn't I have been blossoming? couldn't you have been blossoming? couldn't he have been blossoming? couldn't we have been blossoming? couldn't you have been blossoming? couldn't they have been blossoming?